Question

我正在开发一个应用，其中LoginForm.jsp和UserRegistration.jsp会在特定操作的UserAccount jsp页面上显示。LoginForm当用户按下＆＃39;登录＆＃ 39;按钮 - ＆gt;显示UserAccount表单。在输入和提交详细信息时的UserRegistration表单中 - ＆gt;显示UserAccount表单。以下是请求为UserAccount.html

时的控制器代码

 @RequestMapping(value="/UserAccount.html", method = RequestMethod.POST)
        public ModelAndView userAccountForm(@Valid @ModelAttribute("user") UserDetails user,BindingResult result) {

            if(result.hasErrors())

            {   System.out.println(result.getAllErrors());
                ModelAndView model1=new ModelAndView("UserRegistration");
                return model1;
            }
            // User validation


            System.out.println(user.getAccountType());
            userDAO.create(user);

            ModelAndView model1 = new ModelAndView("UserAccount");
            return model1;


}

loginForm.jsp中

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<html>
<body>
    <h1
        style="background-color: green; color: Yellow; padding: 10px; text-align: center;">Mybank
        Online Login</h1>

    <form:errors path="user.*" />
    <form action="/MyBankProject/UserAccount.html" method="post">
        <div
            style="background-color: yellow; color: black; padding: 10px; text-align: center;"
            align="center">
            <p>
                User ID <input type="text" name="userName" />
            </p>
            <p>
                Password <input type="password" name="password" />
            </p>
            <input type="submit" value="Login" /> <a
                href="/MyBankProject/userRegistration.html">New User?</a>
        </div>
    <input type="hidden" name="page" value="LoginForm"/>

    </form>


</body>
</html>

UserRegistration.jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<html>
<body>
    <h1>${headerMessage}</h1>
    <h3>USER REGISTRATION</h3>

    <form:errors path="user.*" />

    <form action="/MyBankProject/UserAccount.html" method="post">
        <table border="1" style="width:100%" >

            <tr>
                <td>FirstName :</td>
                <td><input type="text" name="firstName" /></td>
            </tr>
            <tr>
                <td>LastName :</td>
                <td><input type="text" name="lastName" /></td>
            </tr>

            <tr>
                <td>User's EmailId :</td>
                <td><input type="text" name="emailId" /></td>
            </tr>
            <tr>
                <td>user's gender :</td>
                <td><select name="gender" multiple>
                        <option value="M">Male</option>
                        <option value="F">Female</option>
                </select></td>
            </tr>
            <tr>
                <td>user's age :</td>
                <td><input type="text" name="age" /></td>
            </tr>
            <tr>
                <td>user's DOB :</td>
                <td><input type="text" name="dOB" /></td>
            </tr>
            <tr>
                <td>Account Type :</td>
                <td><select name="accountType" multiple>
                        <option value="Savings">Savings</option>
                        <option value="Current">Current</option>
                        <option value="FixedDeposit">Fixed Deposit</option>
                </select>
                <td>
            </tr>
            <tr>
                <td>Amount :</td>
                <td><input type="text" name="amount" /></td>
            </tr>
        </table>
        <table>
            <tr>
                <td>UserName</td>
                <td><input type="text" name="userName" /></td>
            </tr>
            <tr>
                <td>Password</td>
                <td><input type="password" name="password" /></td>
            </tr>
        </table>
        <table>
            <tr>
                <td>User's Address :</td>
            </tr>
            <tr>
                <td>country: <input type="text" name="address.country" /></td>
                <td>city: <input type="text" name="address.city" /></td>
                <td>street: <input type="text" name="address.street" /></td>
                <td>pincode:<input type="text" name="address.pincode" /></td>
            </tr>

            <tr>
                <td><button type="submit">Submit</button></td>
                <td><input type="button" onclick="history.back();"
                    value="Cancel"></td>
            </tr>
        </table>
     <input type="hidden" name="page" value="UserRegistration"/>

    </form>

</body>
</html>

现在对我来说，我需要知道UserAccount调用的jsp页面，以便根据它执行不同的操作。我是Spring MVC的新手，并在互联网上搜索解决方案。

Answer 1

HTTP是无状态协议。这意味着您无法对先前的状态做出假设。

我认为你有两个方法可以获得有关上一页的信息。

在表单中添加隐藏字段，并发送带有请求的页面名称。

HTML：

 <form>
     <input type="hidden" name="page" value="[the name of the current page]"/>
 </form>

控制器：

 @RequestMapping(value="/UserAccount.html", method = RequestMethod.POST)
 public ModelAndView userAccountForm(@RequestParam(value="page", required=false) String page) {
     [...]
 }

现在您可以查看page值。

使用会话。将当前页面存储在呈现表单的控制器方法中：

 @RequestMapping("/login")
 public String login(HttpServletRequest request) {
     request.getSession().setAttribute("lastPage", "login");

     return "redirect:/UserAccount.html";
 }

 @RequestMapping("/register")
 public String register(HttpServletRequest request) {
     request.getSession().setAttribute("lastPage", "register");

     return "redirect:/UserAccount.html";
 }

检查lastPage中的userAccountForm()值：

 @RequestMapping(value="/UserAccount.html", method = RequestMethod.POST)
 public ModelAndView userAccountForm(HttpServletRequest request) {
     HttpSession session = request.getSession();
     String lastPage = (String) session.getAttribute("lastPage");

     session.removeAttribute("lastPage");

     [...]
 }

检查请求标头的referer字段。

 @RequestMapping(value="/UserAccount.html", method = RequestMethod.POST)
 public ModelAndView userAccountForm(@RequestHeader(value = "referer", required = false) String referer) {
     [...]
 }

如果有参考，它会将referer作为方法参数。小心。可能没有引用者或该客户操纵该字段。

Answer 2

希望这能解决您的需求。

URL url = new URL(request.getHeader("referer")); 

System.out.println("last page url"+ url.getPath());
if(url.getPath().equals("your last url"){
//code
}

如何知道Spring MVC中的控制器来自哪个jsp页面

2 个答案: